As autodiscovery is often broken or missing on many sites, my feed reader Temboz falls back to testing these suffixes in the forlorn hope there may be a RSS or Atom feed hiding somewhere:

      'feed', 'feed/', 'rss', 'atom', 'feed.xml',
      '/feed', '/feed/', '/rss', '/atom', '/feed.xml',
      'index.atom', 'index.rss', 'index.xml', 'atom.xml', 'rss.xml',
      '/index.atom', '/index.rss', '/index.xml', '/atom.xml', '/rss.xml',
      '.rss', '/.rss', '?rss=1', '?feed=rss2',